Lower respiratory tract sampling in COVID-19 acute respiratory distress syndrome: A focus on microbiology, cellular morphology, cytology, and management impact.

Background: Lower respiratory tract (LRT) sampling through bronchoscopy has been done sparingly in COVID-19 acute respiratory distress syndrome (ARDS) due to the high aerosol risk for the health-care workers (HCWs). Valuable information can be gained by a detailed evaluation of bronchoscopic LRT samples. Methods: LRT samples were obtained by bedside bronchoscopy severe COVID-19 ARDS patients on mechanical ventilation. Microbiological, cellular, and cytological studies including LRT COVID-19 reverse transcription-polymerase chain reaction were analyzed. Results: A total of 100 samples were collected from 63 patients, 53 were males (84%). Forty-three patients (68%) had at least 1 comorbidity. 55% of cases had a secondary bacterial infection, commonly with multidrug-resistant organisms (94.5%). The most common organisms were Klebsiella pneumoniae and Acinetobacter baumannii in 56.3% and 14.5% of cases, respectively. Fungal superinfection was observed in 9 patients (14.3%). Bronchoscopy helped confirm COVID-19 diagnosis in 1 patient and helped rule out COVID-19 in 3 patients. The median bronchoalveolar lavage fluid (BALF) white blood cell (WBC) count was 953 (inter quartile range; 400-2717), with mean neutrophil count 85.2% (±13.9) and mean lymphocyte count 14.8% (±13.9). Repeat sampling done in some patients showed a progressive increase in the total WBC count in BALF, an increase in neutrophil percentage, and a higher chance of isolating an organism on the culture. Rate of superinfection increased with a longer duration of illness. Bronchoscopic LRT sampling contributed significantly to modifying antibiotic coverage and discontinuing steroids in 37% of cases. Conclusions: Our study provides a detailed analysis of bronchoscopic LRT sampling in critically ill COVID-19 patients, augmenting disease understanding and contributing to clinical management.

Critical COVID-19-associated pulmonary mucormycosis: The underreported life-threatening spectrum of the mucormycosis epidemic.

The explosive rise in angioinvasive mucormycosis (MM) in India and other parts of the world has been described as the "epidemic following the COVID-19 pandemic," with the majority being rhino-orbital-cerebral MM. We report a case series of five COVID-19-associated pulmonary MM (CAPM) with an aggressive clinical course. Clinical and radiological clues were limited, and the initial suspicion of CAPM was the morphological appearance on bronchoscopy, which led to the diagnosis. Histopathology was consistently positive in all cases, while other microbiological and molecular tests had varying sensitivity. Most patients had a fulminant and fatal course. Also noted was dual fungal infection in 3/5 cases with coexisting multidrug resistant bacterial infection in all cases. CAPM is the hidden part of the COVID-MM epidemic and warrants a high degree of suspicion with early diagnosis and treatment.

A shorter symptom onset to remdesivir treatment (SORT) interval is associated with a lower mortality in moderate-to-severe COVID-19: A real-world analysis.

OBJECTIVES: Remdesivir is the current recommended anti-viral treatment in moderate-to-severe COVID-19. However, data on impact of timing of therapy, efficacy, and safety are limited. We evaluated the impact of timing of remdesivir initiation (symptom onset to remdesivir treatment [SORT] interval) on in-hospital all-cause mortality in patients with moderate-to-severe COVID-19. METHODS: This retrospective study was conducted between June 25 and October 3, 2020, at a tertiary care dedicated COVID center in India. Patients with moderate-to-severe COVID-19 (moderate: SpO2 <94%; severe: SpO2 <90%) were included. The main outcome was impact of SORT interval on in-hospital all-cause mortality. Subgroups were formed and analyzed based on SORT interval. RESULTS: Of 350 patients treated with remdesivir, 346 were included in the final analysis. Overall, 76 (22.0%) patients died (moderate: 3 [2.8%], severe: 73 [30.8%]). All-cause mortality was significantly lower in patients with SORT interval ≤9 days (n = 260) vs SORT interval >9 days (n = 86; 18.1% vs 33.7%; p = 0.004). The odds of death were significantly lower in patients with SORT interval ≤9 days vs >9 days (odds ratio = 0.43; 95% CI, 0.25-0.75; p = 0.003). CONCLUSION: Remdesivir initiation ≤9 days from symptom onset was associated with mortality benefit, defining a treatment window and reinforcing the need for appropriately-timed remdesivir in moderate-to-severe COVID-19.